docs: def check_var_units(self, ds):
          '''
          Checks each applicable variable for the units attribute
  
          :param netCDF4.Dataset ds: An open netCDF dataset
          '''
          results = []
          for variable in self.get_applicable_variables(ds):
              msgs = []
              # Check units and dims for variable
              unit_check = hasattr(ds.variables[variable], 'units')
              no_dim_check = (getattr(ds.variables[variable], 'dimensions') == tuple())
              # Check if we have no dimensions.  If no dims, skip test
              if no_dim_check:
                  continue
              # Check if we have no units
              if not unit_check:
                  msgs.append("units")
              results.append(Result(BaseCheck.HIGH, unit_check, self._var_header.format(variable), msgs))
  
          return results